Bobbin.



G. H. BENJAMIN.

BOBBIN.

APPLICATION FILED AUG-30, 1913.

Patented Aug. 21, 1917.

GEORGE HILLAED BENJAMIN, 0E NEW YORK, N. Y.

BOBBIN.

Specification of Letters Patent.

Patented Aug. 21, 1917.

Application led August 30, 1913. Serial No. 787,518.

To all whom t may concern f Be it known that I, GEORGE I-IILLARD BEN- JAMIN, a citizen of the United States, residing at New York city, in the county and State of New York, have invented certain new and .useful Improvements in Bobbins, of which the following is a specification.

My invention relates to bobbins of the type consisting of a shank made of wood` or other material which has a tendency to eX- pand and contract when subjected to heat and moisture and subsequently dried, and a base formed wholly or in part of metal, and adapted to surround the lower portionI or head of the shank, and which in practice, coacts with the spindle which imparts rota tion to the bobbin and which is subjected to heavy blows when the bobbin is inserted into and removed from a shuttle, as is the practice in automatic looms.

In bobbins of the type described, it is found difficult to permanently secure the base to the shank. The expansion and contraction of the shank serves to change the diameter of the head of the shank relative to that of the base, and the blows to which the base is subjected act to loosen the base. When the shank and base are not firmly united, it is difficult to place the bobbin upon a spindle, and further, almost impossible to introduce the bobbin into a shuttle. The object of my invention, therefore, is to effect a permanent union between the shank and the base, and to insure e'ective coperation ybetween the bobbin and the spindle, and the bobbin and the shuttle.

The accompanying drawing will serve to illustrate the mechanical features of my invention, in which, Figure 1 is an elevation of a spindle with a centrifugal clutch and a vertical section of a bobbin. Fig.f2 is a perspective view of a base detached from the bobbin. Figs. 3, 4, 5 and 6 are vertical sections through a base and bobbin, showing laodications of the arrangement shown'in lgeferring-to the drawings, 10 indicates a spindle, having a shank portion 11, vwhirl 12 and clutch 13. Located on the spindle is a bobbin 14, composed of a shank 15, which may be of` wood, compressed paper Vor other Y similar material, preferably a material which will not expand and contract when subjected to steaming, otherwise of a material which will absorb a treating material, when treated `as hereinafter described; and a base 16.

I do not limit myself in any wise to the shape of the base. That shown in the drawing consists of an annulus having an outer .wall 17, corrugated to form spaced rings 18, a bottom portion 19 which has two straight sides 20 and two curved sides 21. The horizontal lower wall 22 of the bottom portion 19 is providedwith depending points 23 and an inner tubular wall 24, and corresponds in vertical height with that of the clutch faces 25. The base 16 is, as stated, annular in shape, and situated in the cavity of the annulusis the lower end or head 26 of the shank 15.

The construction so far as described, pre.- sents no features of novelty, with the exception of the shape described for the base shown in Fig. 2. I will now describe the method of securing the base 16 to the shank 15 as disclosed in the various figures.

ljreferably, the shank 15 is first thor-` l oughly dried toremove any moisture, after addition product, during the immersion ofy the bobbin. A temperature of about .50 centigrade may be employed. The time of immersion will depend upon the character of the material forming the shank; generally from fifteen to thirty minutes immersion will be sufficient. The immersion may take place under pressure if desired. The bobbins are then removed from the liquid and dried, either in the atmosphere or lat a low temperature. This drying, however, is not essential. The bobbin after being removed from the liquid, is then inserted into the base 16 and the top of the base 27 rolled down upon the shank 15. The whole bobbin is then introduced into an oven and subjected to a temperature of 100o centigrade for several hours. The temperature acts to convert the addition product, which impregnates the material of the bobbin, from v vthe shank 15, I "may product, expansion and contraction of the .shank cannot occur, as no moisture will find its way into the substance of the shank, and consequently a firm union between the shan and the base results.

In order to insure as against any possible expansion and contraction of the head 26 of insert a compressible material 28 between the shank 15 and the base 16. i

In Fig. 1, the compressible material, which is preferably cork, is inserted between the bottom of the head 26 and the inner surface of the bottom wall 22 of the base 16.

In Fig. 3 the material 28 is placed as in Fig. 1 and alsoa second body of the matemay occur to a slight extent when the bobbin i with bobbins which are not treated with the l addition product?? as described, in which case the material is made thicker than when used yin connection with bobbins which have been treated with the addition product.

rial upon a shelf 29, which corresponds toI the position of the bottom of the lowest ring 18 of the base. J

In Fig. 4 the material 28 is placed as in Fig. 1 and also between the top of the head 26 of the shank 15 and the inner surface of the top 27 of the outer wall ,17 of thel ference being that the base has a different shape and consequently the material'at the lower part of the baseis inclined instead of being horizontal.

In Fig. 6 the material 28 is placed as in Fig. 4, and also surrounds the head 2.6 of the shank 15, vso that there is in effect, an envelop of compressible material surrounding the head and between the head and the inner wall of the annulus.

I do not limit myself in any wise to the particular location of the compressible material. It may be placed otherwise than as shown. The purpose 'of this material, as

previously indicated, is to compensate for Y any expansion and contraction which may take place in theshank, its head or in the base. Any change in diameter of the head of the shank, when treatedas described, yis practically negligible. Change of diameter of the base will amount to very little, but

The treatment with the addition product is useful in that it not only prevents expansion and Acontraction of the bobbin at its head and thus prevents the shank from separating from the base, but also prevents any splitting, cracking, shivering, or splintering of the top of the bobbin, which is a frequent occurrence in bobbins as heretofore treated', owing to the very rough way in which they are handled when dofting empty bobbins, and which makes the bobbins useless for spinning purposes I wish it understood that my improved method of treating the bobbins may be employed irrespective of Whether a separable base is or is not used;.thatI is, it may be employed with bobbins-having spaced 'rings of wire secured to their outer surface with or without a center tube which coacts with the spindle clutch. f

Y Having thus described my invention, I

claim:

A bobbin comprising a shank having a head portion and impregnated with a material which is insoluble in acids and most of the 'alkalis, a base lineally, substantially coeXtensive with the head portion and shaped to inclose the outer and inner surfaces and bottom thereof, and a bodyof compressible material* situated between the head and the base.

In testimony whereof, I afix my signature, in the presence of two Witnesses.

GEORGE HILLAEE BENJAMIN.

Witnesses:

CHAs. E. McCARTHY, i HELEN E. KoELsoH. 

